Suction cleaning machine



Jan. 7, 1941. R J HUTH|N$QN 2,227,649

SUCTION CLEANING MACHINE INVENTOR Filed Feb. 25, 1938 B RICHARD J. HUT cnmson y 0 0L )9 a1 mm w :1 m Q Q WYFFT:

Fuzrwvk ATTORNEYS Patented Jan. 7, 1941 UNITED STATES PATENT OFFICE SUCTION CLEANING MACHINE Richard John Hutchinson, Fulham, London, England Application February 23, 1938, Serial No. 192,111 In Great Britain March 1, 1937 4 Claims.

for the purpose of loosening and agitating the dust from a carpet and thereby facilitating the removal of the dust by the machine.

According to the present invention an agitating device is provided capable of being, mounted within the nozzle of a suction cleaning machine, the said agitating device being power driven or freely rotatable and consisting of a cylindrical body having thereon a number of eccentric surfaces constituting the agitating elements.

The invention also consists in an agitating device for application to the nozzle of a suction cleaning machine and comprising a cylindrical roller having a number of cylindrical elements formed integral therewith and projecting BC.- centrically from said roller at intervals throughout its length.

Reference will now be made to the accompanying drawing which illustrates by way of example a construction according to the invention and in which:

Fig. 1 is a longitudinal sectional elevation of the improved agitating device,

Fig. 2 is an end elevation,

Fig. 3 is a sectional elevation taken on the line 33 of Fig. 1, and

Fig. 4 is an outside elevation.

The construction illustrated is designed for mounting within the nozzle of a suction cleaning machine and comprises a removable spindle a the ends b of which are of reduced diameter and are adapted to enter bearings mounted in the ends of the nozzle which is of considerably greater breadth than depth; The end portions 12 also carry bearings c mounted within annular frame members which are formed as shown at d in Fig. l to engage over annular projections e formed at the ends of a cylindrical body or roller j which is hollow and of an internal diameter greater than the diameter of the spindle a so that the said roller can rotate freely on the bearings c relatively to the spindle when driven frictionally from the surfaces over which the nozzle is moved or when driven positively from the operating motor of the suction cleaning machine.

The agitation of dust is effected by means of a number of elements 9 formed integral with, and projecting at intervals from the said cylindrical body ,f as shown in Figs. 1 and 4. The elements g are themselves of cylindrical form as shown in Figs. 2 and 3 and project eccentrically from the surface of the cylindrical body 1 in such manner that a cross section taken at any point in the length of the agitator is always a circle. One convenient arrangement of the agitating members g is shown in Figs. 3 and 4 wherein they are 5 disposed one at each end of the cylindrical body f with two others at intervals in the length thereof so that when the agitator is to be power driven a driving belt can be accommodated around the portion 11. at the middle of the agitator between l0 the two inner members 9. The disposition of the projecting elements 9 is such that when the end elements push the fabric to be cleaned downwards the central portion of the fabric beneath the nozzle tends to be drawn upwards by the suction 15 of the machine. When the central projecting elements in turn press the fabric downwards the fabric beneath the ends of the nozzle is raised, these alternate operations producing an oscillating efiect on the fabric so as to loosen the dust 20 and enable it to be sucked away from the carpet through the suction nozzle. It is important that the elements g should be constructed and arranged in the manner above described so as to impart a sinuous or wavy motion to the fabric 25 during cleaning and avoid the shock of beating.

In addition to the eccentric agitating elements 9 the cylindrical body I may also be provided with a number of series of suitably disposed bristles k. The bristles are preferably arranged 30 as shown in the accompanying drawing in rows extending parallel to the axis of rotation of the agitator, each row being disposed substantially opposite the projecting eccentric elements and each row being of such length that taken to- 35 gether they form a series extendingthroughout the length of the agitator except at the portion 72 which as already stated is left free to accommodate a driving belt if required. With this disposition the bristles come into more effective op- 40 eration when the fabric is drawn into the nozzle by suction.

With the bristles arranged as described the rotation of the agitator as a whole subjects the surface under treatment alternately to pressure 45 and brushing to loosen and agitate the dust which is sucked away through the nozzle of the machine.

I claim:

1. An agitating device for application to the nozzle of a suction cleaning machine, comprising a cylindrical body adapted for rotation and having thereon and projecting therefrom a number of fixed eccentric elements having outer surfaces constituting agitating elements, and bristles arranged in rows extending generally longitudinally of the axis of the body, each row being disposed substantially opposite one of the projecting eccentric elements whereby rotation of the agitator subjects the surface under treatment to alternate pressure and brushing.

2. An agitating device having a body adapted for rotation, said body including elements longitudinally spaced apart, said elements forming eccentric projections on the body disposed out of longitudinal alignment, said elements at portions thereof substantially merging into the outer sur face of the body, rows of bristles extending along the outer surface of the body in radial alignment with the respective elements, and said bristles between said elementsbeing of an extent collectively equalling the length of the space between said elements.

3. An agitating device comprising a body having means for mounting it for rotation in the nozzle of a suction clean-ing machine, said body having a rigid portion eccentric thereto and pro jecting from a side thereof, and a row of bristles extending along the body at the side thereof 0pposite to said eccentric portion and longitudinally beyond said eccentric portion.

4. An agitating device having a body adapted for rotation having a driving portion intermediate its ends and an agitating portion on each side of the driving portion, each driving portion including elements longitudinally spaced apart, said elements of each agitating portion being disposed out of longitudinal alignment, said elements at portions thereof substantially merging into the outer surface of the body, rows of bristles extending along the outer surface ofthe body in radial alignment with the respective elements, and said bristles between said elements being of an extent collectively equalling the length of the space between said elements.

RICHARD JOHN HUTCHINSON. 

